[Daryl]

From the above:

That being said- It would be that the golfer could strike the ball at any point on the "circles" with the same results relative to the tangent to the circle at the point struck. ??
Which then leads me to the 2 thoughts. 1. Is the circle shape important beyond practical use? 2. Is anything important beyond alignment of the clubface relative to the direct of the clubface at impact?

HB

That's it. Well said.

"It would be that the golfer could strike the ball at any point on the "circles" with the same results relative to the tangent to the circle at the point struck."

So what do we call that point on the orbit when the tangent to the circle is aimed at the Target?

The Club is designed with length and lie angle and loft. The loft plane is a vertical plane. Rebound will be at right angles to the face. When this geometry (Shaft in a vertical plane at the correct lie angle) intersects the bottom of the circle, we have Low Point. That alignment at separation causes the rebound to occur along the Target line (clubface alignment).